fix(package): update @keyv/redis to version 2.1.1

Closes #30

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
     "semantic-release": "semantic-release"
   },
   "dependencies": {
-    "@keyv/redis": "^1.3.8",
+    "@keyv/redis": "^2.1.1",
     "keyv": "^3.0.0"
   },
   "devDependencies": {